21232023021323 has 16 divisors (see below), whose sum is σ = 21500302037760. Its totient is φ = 20964044865696.

The previous prime is 21232023021257. The next prime is 21232023021347. The reversal of 21232023021323 is 32312032023212.

It is a cyclic number.

It is not a de Polignac number, because 21232023021323 - 2⁴⁴ = 3639836976907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21232023021292 and 21232023021301.

It is not an unprimeable number, because it can be changed into a prime (21232023021023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1388886386 + ... + 1388901672.

It is an arithmetic number, because the mean of its divisors is an integer number (1343768877360).

Almost surely, 2^{21232023021323} is an apocalyptic number.

21232023021323 is a deficient number, since it is larger than the sum of its proper divisors (268279016437).

21232023021323 is a wasteful number, since it uses less digits than its factorization.

21232023021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23986.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21232023021323 its reverse (32312032023212), we get a palindrome (53544055044535).

The spelling of 21232023021323 in words is "twenty-one trillion, two hundred thirty-two billion, twenty-three million, twenty-one thousand, three hundred twenty-three".